Meaning

verb clean with one's bill

verb pride or congratulate (oneself) for an achievement

verb dress or groom with elaborate care

originFrom Middle English pren, from Old English prēon, from Proto-Germanic *preunaz (compare Icelandic prjónn (“pin, knitting-needle”), Danish pryne (“needle, eel-spear”)), of uncertain origin, but perhaps from Proto-Indo-European *brewn- (“protrusion, tip, edge”) (compare Lithuanian briaunà (“edge”), Albanian brez (“belt, girdle”)). Cognate with German Pfriem. The verb is from Middle English prenen,…

Etymology from Wiktionary, CC BY-SA 3.0